松辽盆地梨树断陷层序类型及发育模式  

Sequence stratigraphic types and models in Lishu rift, Songliao basin

作　　者：陈贤良[1] 纪友亮[1] 樊太亮[2] 王宏语[2] 赵春满[3] 聂文彬[2] 陈晓艳[1] 闫宁[4] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]中国地质大学能源学院,北京100083 [3]中国石化东北油气分公司勘探开发研究院,吉林长春130062 [4]中国石化江汉分公司物探研究院,湖北武汉430035

出　　处：《中南大学学报（自然科学版）》2014年第4期1151-1162,共12页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金面上资助项目(41272157);国家重大科技专项(2011ZX05003-002)

摘　　要：根据层序地层学原理及构造-沉积关系,对梨树断陷构造样式和层序类型与层序地层模式进行研究,并分析二者之间的相互关系。依据构造特征将梨树断陷断陷期划分为初始裂陷、快速裂陷和裂陷萎缩期3个演化阶段。相应的将梨树断陷断陷层划分为3个二级层序和7个三级层序,建立其层序格架,阐明其内部沉积特征。最终依据构造特征、气候变迁、沉积物供给和层序发育特征等进行综合研究。研究结果表明:梨树断陷断陷期发育3种层序类型和3种层序地层模式,其中SQ1和SQ2层序为初始裂陷期洪积层序,SQ3层序为快速裂陷湖泊层序,均发育简单箕状斜坡层序地层模式;SQ4,SQ5和SQ6层序为快速裂陷湖泊层序,发育快速裂陷缓坡坡折层序地层模式;SQ7层序为断拗转换期冲积层序,发育断拗转换层序地层模式。According to the principle of sequence stratigraphy and the relationship between the tectonic structure and deposition, the structure pattern，sequence type and sequence model were studied in Lishu rift, and the relationship between tectonic structure and deposition was analyzed. According to the structural characteristics, rift period of Lishu rift was divided into three evolution stages, i.e. initial rifting, rapid rifting and depression periods. Accordingly, three two-order sequences and seven third-order sequences were identified in Lishu rift, and the sequence frame was built, and the sedimentary characteristics of each sequence were described. Furthermore, based on comprehensive study of structural characteristics, climate change, sediment supply and sequence development, the results show that the rift period develops three sequence types and three types of sequence model. SQ1 and SQ2 sequences are diluvium sequence of the initial rifting period and SQ3 sequence is lake sequence of rapid rifting period, which all develop simple half graben slope sequence model. SQ4, SQ5 and SQ6 sequences are lake sequence of rapid rifting period and develop rapid rift gentle slope slope-break sequence model. SQ7 sequence is alluvial sequence of depression period and develops transition stage sequence model.

关 键 词：层序类型 层序模式 坡折带 构造样式 梨树断陷 

分 类 号：P539.2[天文地球—古生物学与地层学]